Again, the difference is doctrine vs. doctrine. Some Protestant groups allow all kind of perversions as a matter of doctrine. We don't. We also consider bearing a false witness a serious sin, by the way. You?
Honestly, that is to the point of being laughable. Shall we bring up paying for indulgences? Was that a "perversion of doctrine" or a bad mistake from the throne Chair of Peter? How about the worship (not veneration) of Mary? Or that God's grace is dispensed through a wafer and a shot of wine? Or God disperses His knowledge through the Pope? Even the Orthodox don't believe some of these things.
Personally I prefer to make my own mistakes and allow God to call me on the carpet for them rather than following the mistakes established by others.